CyberPower ST900U 12-Outlet Standby UPS

Overview

The CyberPower ST900U is a standby uninterruptible power supply designed to protect your essential electronics from power interruptions and surges. It provides 900 VA and 500 watts of power capacity, enough to keep critical devices running briefly or allow safe shutdown during outages. With 12 outlets—six offering battery backup and surge protection, and six providing surge protection only—this UPS fits well in home offices, media centers, and small business environments. Its compact and quiet design ensures it won’t disrupt your workspace, while two USB-A ports with a combined 2.1A output offer convenient charging for mobile devices.

Key features

• Provides battery backup and surge protection for critical devices through six dedicated outlets
• Additional six outlets offer surge protection for less critical equipment, safeguarding your entire setup
• 890-joule surge protection rating defends against damaging power spikes common in unstable electrical environments
• Two USB-A ports with 2.1A shared output allow charging of smartphones, tablets, and other USB-powered devices without extra adapters
• ENERGY STAR certification ensures energy-efficient operation, helping reduce electricity costs
• Includes PowerPanel Personal Software for real-time power monitoring and automated safe shutdowns from your computer
• Compact and quiet design fits seamlessly into home or office spaces without adding noise or clutter
• Full-load runtime of up to 2 minutes provides enough time to save work and power down devices safely during outages
• $125,000 connected equipment guarantee offers added peace of mind against equipment damage
• Three-year limited warranty reflects CyberPower’s commitment to long-term reliability

Key specs

• Power capacity: 900 VA / 500 watts
• Outlets: 12 total; 6 with battery backup and surge protection, 6 with surge protection only
• Surge protection rating: 890 joules
• USB ports: 2 USB-A ports with combined 2.1A output
• Runtime at full load: up to 2 minutes
• Certification: ENERGY STAR certified
• Warranty: three-year limited warranty
• Connected equipment guarantee: $125,000

Connectivity and compatibility

This UPS supports a wide range of devices commonly found in home and office setups. The six battery backup outlets are ideal for computers, routers, modems, and entertainment systems that require uninterrupted power. The additional six surge-only outlets protect printers, monitors, and other peripherals that do not need battery backup but still benefit from surge protection. The two USB-A ports provide a convenient way to charge mobile devices without occupying the main outlets or requiring separate chargers.

Ideal uses and environments

The CyberPower ST900U is well suited to home offices, small business workstations, and media centers where protecting sensitive electronics from power interruptions is critical. Its power capacity and outlet configuration make it a strong choice for users who need to safeguard computers and networking equipment while also protecting additional devices from surges. The compact and quiet design ensures it fits naturally into environments where space and noise levels matter.